Never worn The adidas by Stella McCartney Outdoorboost 2.0 COLD.RDY Shoes were designed to keep you active outdoors, even when the temperatures start to drop. The perfect mix of style and function, the shoes are a homage to both Stella McCartney's powerful visual identity and adidas' performance-first approach to design. The shoes are insulated with COLD.RDY lining to help you feel dry and warm as you put in the miles, and are set on an energy-returning Boost midsole. Put simply, they are the perfect sartorial accomplice for your next run.